Grinding wheel for paper pulp



Sept. 10, 1929. E. ANDERSON GRINDING WHEEL FOR PAPER PULP Filed Jan. 17, 1,925

Patented Sept. 10, 1929.

UNIT D STATES EDWARD ANDERSON, OF DAYTON, OHIO,

ASSIGNOR, IBY 'MEsnE'. Assreniunnrs, TO m J SIMONDS WORDEN WHITE COMPAN YpA CORPORATION OF GRINDING WHEEL non PAPER rum.

Application filed January This invention relates to grinding wheels, more particularly wheels for grinding wood in the manufacture of paper pulp.

Briefly, my improved wheel consists of a shaft on which is mounted a series of metal spiders or disks. A plurality of segmental blocks of abrasive material, forming rings, are mounted on these disks, the inner edges of the segments being confined between the disks and secured there by pressing the terminal disks toward each other. Other rings, also composed of segments, are placed between and interlocked with the first mentioned rings.

Grinding wheels in which the abrasive element consists of a plurality of rings are not new, nor is it new to build up such rings with segmental blocks of abrasive material. My invention resides in certain novel structural features, the advantages of which will be ap parent when my improved wheel has been described. I shall therefore proceed to describe it, referring to the accompanying drawing, in which,

Fig. 1 is a side elevation of the wheel in its completed state;

Fig. 2 is a sectional View, and

Fig. 3 is an end view of my improved wheel.

Mounted on a shaft 10 are two metal disks 11. Between these disks on the shaft are disks or spiders 12. All of these disks 11 and 12, are secured to the shaft with splines 13, by which the disks are positively rotate-d when the shaft rotates, but all are free to move longitudinally on the shaft. The shaft is threaded at 14. 14., to receive nuts 15, whereby the disks 11--11 may be moved toward each other for a purpose hereinafter referred to.

Rings composed of segmental blocks 16, of abrasive material, are carried by the disks 11 and 12, the inner edges of the blocks being confined between the disks and securely held there by pressure imparted by screwing up the nuts 15. The portions of the blocks confined between the disks are dove-tail shaped in cross section, this being shown at 17 in Fig. 2, and the portions of the disks which confine the dove-tails have a shape comple- 17, 1925. Serial N0.3,107.-

mentary to the dove-tail. The portions of the blocl s16 outsideof the disks are wedge; shaped in cross section, the thicker portion. being atthe outer part of the ring. .The disks 12 are approximately as thick as the blocks 16 attheir thinner parts, which causes the formationof spaces between adjacent rings. Because of, the blocksbecoming gradually thickertowardtheir peripheries these spaces become gradually broader "from the pe riph-ery of the wheel inward. Within these annular spaces 1 place other rings, also composed of segmental blocks of abrasive ma terial, these being indicated at 18 in Fig. 2. In cross section the segments 18 are also wedge shaped,'but the thicker part is nearest the shaft, the reverse of segments 16. Thus the segments 18 are, in effect, interlocked with the segments 16. As the segments 16 aresecurely anchored to the disks by means of the dove-tailstall of the segments, both 16 i and 18, are enabled to resist the effect of 'centrifugal force,flas well as other forces tending to dislodge them. In order to give the outer rows ofsegments greater stability the disks ll are slightly larger in diameter than the disks 12. Asshown in Fig. 1 the longitudinal joints between the segments are offset. It isnot essential thattherings be made up of segments ,solid rings may beused. The

advantage of using segments is that they are easier to make; Ifdesired some other manner of interlocking the segments and 18 may be used. IMoreover, the intermediate rings may be dispensed with, together with the spaces in which they are lodged. The? segments 16 may bebroadened and arranged 1 to overlie half the thicknessfof the disks12 bywhichthey are supported, thus bringing neighboring segments together. If the rings 1 be made in this way the disks 12 may be made thinner so as "to reduce the width of the overlying parts of the segments This isso, ob,-

trate this suggested modification.

,As the disks are free to'm'ove on the shaft, screwing the nuts 15 tightclamps all of the rings with substantially equal pressure. The hubs on the disks are spaced apart, and there is nothing toprevent thedisks moving vious; thatit is deemedv unnecessary toilluslongitudinally and accommodating themselves to this tightening arrangement. Drawing the nuts tight flexes the disks 11 slightly, resulting in the segments being grippedbetween the disks by a resilient pressure. While the olamping arrangement shownis quite sufficient for the purpose, and capableof holding the segments firmly in place, if desired a little cement of some kind.- may beipoured into the crevices. Thismay be, desirable-as-V-a means of excluding water from the interior of the wheel. Melted sulphur makesra; good cement for this purpose. While I have shown a Wheel with four-main and threesecing complementary, thereby filling the spaces between the first mentioned rings, said rings being composed of segments of equal degree, the inter-segmental joints of the last mentioned rings being placed intermediate the j oints; of the first mentioned rings;

EDWARD ANDERSON.

ment-of a-pproach between the terminal disks in'the series W-i'll cause said-.confinedportions of the ringsto b'e grippedbetween the disks, the unconfined portions of the rings being-of such thicknesstliatspaces are left between them, which spaces are occupied by additional rings, and means for drawing said terminal disks together to grip said inner edges," said means acting at a substantial distance Wltlllfi the inner edges, because of'whiclr the pressure exertedon therings by the disksis'due to the resilie'ncf of the terminal disks:

2.- Inagrinding-wheel, a shaft, three-or more disks-carried thereb and free to slide,

40 longitudinally thereon, a rasiveri-ngs" sup ported thereby, the inner edges. of said rings;

being confined 1 between said ldisks, one ring; between each two disks, said ringsbeingheld against the ,actionof centrifugal force by a :,dove-tail connection-to thedisks, and addi tional rings between the aforesaid rings, theportions of the first mentioned' rings outside of the disks being wedge-shape in -cross" sec-' tion with the peripheral portion tliethickest, the crosssection ofthe intervening rings be-;

ing complementary, thereby-filling the spaces between the firstmentione rings.

3. In a grindingwheel, 'ashaft, three or" more disks carried thereb'y and-Ifreei toslide longitudinally thereon,- abrasive rings; su:p Eorted thereby, the inner-edges ofsa-id'ringsj eing confined between said disks, one ring-3 between each two disks, s'aidri'ngs being held against the action of centrifugalforce; b'y'a dove-tail connection to-the disks, and ad ditional rings ,betweenathe" aforesaid rings, the

portions: of the first-mentioned rings outside of? the disks; being wedge-shape in: cross sectionrwith-the peripheral portion the thickest, V

the cross sectionnof .the intervening Tings-be 

